maintenance/namespaceDupes.php

   1 <?php
   2 /**
   3  * Check for articles to fix after adding/deleting namespaces
   4  *
   5  * Copyright © 2005-2007 Brion Vibber <brion@pobox.com>
   6  * https://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  * @ingroup Maintenance
  25  */
  26
  27 require_once __DIR__ . '/Maintenance.php';
  28
  29 use MediaWiki\Linker\LinkTarget;
  30 use MediaWiki\MediaWikiServices;
  31 use Wikimedia\Rdbms\ResultWrapper;
  32 use Wikimedia\Rdbms\IMaintainableDatabase;
  33
  34 /**
  35  * Maintenance script that checks for articles to fix after
  36  * adding/deleting namespaces.
  37  *
  38  * @ingroup Maintenance
  39  */
  40 class NamespaceDupes extends Maintenance {
  41
  42         /**
  43          * @var IMaintainableDatabase
  44          */
  45         protected $db;
  46
  47         private $resolvablePages = 0;
  48         private $totalPages = 0;
  49
  50         private $resolvableLinks = 0;
  51         private $totalLinks = 0;
  52
  53         public function __construct() {
  54                 parent::__construct();
  55                 $this->addDescription( 'Find and fix pages affected by namespace addition/removal' );
  56                 $this->addOption( 'fix', 'Attempt to automatically fix errors' );
  57                 $this->addOption( 'merge', "Instead of renaming conflicts, do a history merge with " .
  58                         "the correct title" );
  59                 $this->addOption( 'add-suffix', "Dupes will be renamed with correct namespace with " .
  60                         "<text> appended after the article name", false, true );
  61                 $this->addOption( 'add-prefix', "Dupes will be renamed with correct namespace with " .
  62                         "<text> prepended before the article name", false, true );
  63                 $this->addOption( 'source-pseudo-namespace', "Move all pages with the given source " .
  64                         "prefix (with an implied colon following it). If --dest-namespace is not specified, " .
  65                         "the colon will be replaced with a hyphen.",
  66                         false, true );
  67                 $this->addOption( 'dest-namespace', "In combination with --source-pseudo-namespace, " .
  68                         "specify the namespace ID of the destination.", false, true );
  69                 $this->addOption( 'move-talk', "If this is specified, pages in the Talk namespace that " .
  70                         "begin with a conflicting prefix will be renamed, for example " .
  71                         "Talk:File:Foo -> File_Talk:Foo" );
  72         }
  73
  74         public function execute() {
  75                 $this->db = $this->getDB( DB_MASTER );
  76
  77                 $options = [
  78                         'fix' => $this->hasOption( 'fix' ),
  79                         'merge' => $this->hasOption( 'merge' ),
  80                         'add-suffix' => $this->getOption( 'add-suffix', '' ),
  81                         'add-prefix' => $this->getOption( 'add-prefix', '' ),
  82                         'move-talk' => $this->hasOption( 'move-talk' ),
  83                         'source-pseudo-namespace' => $this->getOption( 'source-pseudo-namespace', '' ),
  84                         'dest-namespace' => intval( $this->getOption( 'dest-namespace', 0 ) ) ];
  85
  86                 if ( $options['source-pseudo-namespace'] !== '' ) {
  87                         $retval = $this->checkPrefix( $options );
  88                 } else {
  89                         $retval = $this->checkAll( $options );
  90                 }
  91
  92                 if ( $retval ) {
  93                         $this->output( "\nLooks good!\n" );
  94                 } else {
  95                         $this->output( "\nOh noeees\n" );
  96                 }
  97         }
  98
  99         /**
 100          * Check all namespaces
 101          *
 102          * @param array $options Associative array of validated command-line options
 103          *
 104          * @return bool
 105          */
 106         private function checkAll( $options ) {
 107                 global $wgContLang, $wgNamespaceAliases, $wgCapitalLinks;
 108
 109                 $spaces = [];
 110
 111                 // List interwikis first, so they'll be overridden
 112                 // by any conflicting local namespaces.
 113                 foreach ( $this->getInterwikiList() as $prefix ) {
 114                         $name = $wgContLang->ucfirst( $prefix );
 115                         $spaces[$name] = 0;
 116                 }
 117
 118                 // Now pull in all canonical and alias namespaces...
 119                 foreach ( MWNamespace::getCanonicalNamespaces() as $ns => $name ) {
 120                         // This includes $wgExtraNamespaces
 121                         if ( $name !== '' ) {
 122                                 $spaces[$name] = $ns;
 123                         }
 124                 }
 125                 foreach ( $wgContLang->getNamespaces() as $ns => $name ) {
 126                         if ( $name !== '' ) {
 127                                 $spaces[$name] = $ns;
 128                         }
 129                 }
 130                 foreach ( $wgNamespaceAliases as $name => $ns ) {
 131                         $spaces[$name] = $ns;
 132                 }
 133                 foreach ( $wgContLang->getNamespaceAliases() as $name => $ns ) {
 134                         $spaces[$name] = $ns;
 135                 }
 136
 137                 // We'll need to check for lowercase keys as well,
 138                 // since we're doing case-sensitive searches in the db.
 139                 foreach ( $spaces as $name => $ns ) {
 140                         $moreNames = [];
 141                         $moreNames[] = $wgContLang->uc( $name );
 142                         $moreNames[] = $wgContLang->ucfirst( $wgContLang->lc( $name ) );
 143                         $moreNames[] = $wgContLang->ucwords( $name );
 144                         $moreNames[] = $wgContLang->ucwords( $wgContLang->lc( $name ) );
 145                         $moreNames[] = $wgContLang->ucwordbreaks( $name );
 146                         $moreNames[] = $wgContLang->ucwordbreaks( $wgContLang->lc( $name ) );
 147                         if ( !$wgCapitalLinks ) {
 148                                 foreach ( $moreNames as $altName ) {
 149                                         $moreNames[] = $wgContLang->lcfirst( $altName );
 150                                 }
 151                                 $moreNames[] = $wgContLang->lcfirst( $name );
 152                         }
 153                         foreach ( array_unique( $moreNames ) as $altName ) {
 154                                 if ( $altName !== $name ) {
 155                                         $spaces[$altName] = $ns;
 156                                 }
 157                         }
 158                 }
 159
 160                 // Sort by namespace index, and if there are two with the same index,
 161                 // break the tie by sorting by name
 162                 $origSpaces = $spaces;
 163                 uksort( $spaces, function ( $a, $b ) use ( $origSpaces ) {
 164                         return $origSpaces[$a] <=> $origSpaces[$b]
 165                                 ?: $a <=> $b;
 166                 } );
 167
 168                 $ok = true;
 169                 foreach ( $spaces as $name => $ns ) {
 170                         $ok = $this->checkNamespace( $ns, $name, $options ) && $ok;
 171                 }
 172
 173                 $this->output( "{$this->totalPages} pages to fix, " .
 174                         "{$this->resolvablePages} were resolvable.\n\n" );
 175
 176                 foreach ( $spaces as $name => $ns ) {
 177                         if ( $ns != 0 ) {
 178                                 /* Fix up link destinations for non-interwiki links only.
 179                                  *
 180                                  * For example if a page has [[Foo:Bar]] and then a Foo namespace
 181                                  * is introduced, pagelinks needs to be updated to have
 182                                  * page_namespace = NS_FOO.
 183                                  *
 184                                  * If instead an interwiki prefix was introduced called "Foo",
 185                                  * the link should instead be moved to the iwlinks table. If a new
 186                                  * language is introduced called "Foo", or if there is a pagelink
 187                                  * [[fr:Bar]] when interlanguage magic links are turned on, the
 188                                  * link would have to be moved to the langlinks table. Let's put
 189                                  * those cases in the too-hard basket for now. The consequences are
 190                                  * not especially severe.
 191                                  * @fixme Handle interwiki links, and pagelinks to Category:, File:
 192                                  * which probably need reparsing.
 193                                  */
 194
 195                                 $this->checkLinkTable( 'pagelinks', 'pl', $ns, $name, $options );
 196                                 $this->checkLinkTable( 'templatelinks', 'tl', $ns, $name, $options );
 197
 198                                 // The redirect table has interwiki links randomly mixed in, we
 199                                 // need to filter those out. For example [[w:Foo:Bar]] would
 200                                 // have rd_interwiki=w and rd_namespace=0, which would match the
 201                                 // query for a conflicting namespace "Foo" if filtering wasn't done.
 202                                 $this->checkLinkTable( 'redirect', 'rd', $ns, $name, $options,
 203                                         [ 'rd_interwiki' => null ] );
 204                                 $this->checkLinkTable( 'redirect', 'rd', $ns, $name, $options,
 205                                         [ 'rd_interwiki' => '' ] );
 206                         }
 207                 }
 208
 209                 $this->output( "{$this->totalLinks} links to fix, " .
 210                         "{$this->resolvableLinks} were resolvable.\n" );
 211
 212                 return $ok;
 213         }
 214
 215         /**
 216          * Get the interwiki list
 217          *
 218          * @return array
 219          */
 220         private function getInterwikiList() {
 221                 $result = MediaWikiServices::getInstance()->getInterwikiLookup()->getAllPrefixes();
 222                 $prefixes = [];
 223                 foreach ( $result as $row ) {
 224                         $prefixes[] = $row['iw_prefix'];
 225                 }
 226
 227                 return $prefixes;
 228         }
 229
 230         /**
 231          * Check a given prefix and try to move it into the given destination namespace
 232          *
 233          * @param int $ns Destination namespace id
 234          * @param string $name
 235          * @param array $options Associative array of validated command-line options
 236          * @return bool
 237          */
 238         private function checkNamespace( $ns, $name, $options ) {
 239                 $targets = $this->getTargetList( $ns, $name, $options );
 240                 $count = $targets->numRows();
 241                 $this->totalPages += $count;
 242                 if ( $count == 0 ) {
 243                         return true;
 244                 }
 245
 246                 $dryRunNote = $options['fix'] ? '' : ' DRY RUN ONLY';
 247
 248                 $ok = true;
 249                 foreach ( $targets as $row ) {
 250                         // Find the new title and determine the action to take
 251
 252                         $newTitle = $this->getDestinationTitle( $ns, $name,
 253                                 $row->page_namespace, $row->page_title, $options );
 254                         $logStatus = false;
 255                         if ( !$newTitle ) {
 256                                 $logStatus = 'invalid title';
 257                                 $action = 'abort';
 258                         } elseif ( $newTitle->exists() ) {
 259                                 if ( $options['merge'] ) {
 260                                         if ( $this->canMerge( $row->page_id, $newTitle, $logStatus ) ) {
 261                                                 $action = 'merge';
 262                                         } else {
 263                                                 $action = 'abort';
 264                                         }
 265                                 } elseif ( $options['add-prefix'] == '' && $options['add-suffix'] == '' ) {
 266                                         $action = 'abort';
 267                                         $logStatus = 'dest title exists and --add-prefix not specified';
 268                                 } else {
 269                                         $newTitle = $this->getAlternateTitle( $newTitle, $options );
 270                                         if ( !$newTitle ) {
 271                                                 $action = 'abort';
 272                                                 $logStatus = 'alternate title is invalid';
 273                                         } elseif ( $newTitle->exists() ) {
 274                                                 $action = 'abort';
 275                                                 $logStatus = 'title conflict';
 276                                         } else {
 277                                                 $action = 'move';
 278                                                 $logStatus = 'alternate';
 279                                         }
 280                                 }
 281                         } else {
 282                                 $action = 'move';
 283                                 $logStatus = 'no conflict';
 284                         }
 285
 286                         // Take the action or log a dry run message
 287
 288                         $logTitle = "id={$row->page_id} ns={$row->page_namespace} dbk={$row->page_title}";
 289                         $pageOK = true;
 290
 291                         switch ( $action ) {
 292                                 case 'abort':
 293                                         $this->output( "$logTitle *** $logStatus\n" );
 294                                         $pageOK = false;
 295                                         break;
 296                                 case 'move':
 297                                         $this->output( "$logTitle -> " .
 298                                                 $newTitle->getPrefixedDBkey() . " ($logStatus)$dryRunNote\n" );
 299
 300                                         if ( $options['fix'] ) {
 301                                                 $pageOK = $this->movePage( $row->page_id, $newTitle );
 302                                         }
 303                                         break;
 304                                 case 'merge':
 305                                         $this->output( "$logTitle => " .
 306                                                 $newTitle->getPrefixedDBkey() . " (merge)$dryRunNote\n" );
 307
 308                                         if ( $options['fix'] ) {
 309                                                 $pageOK = $this->mergePage( $row, $newTitle );
 310                                         }
 311                                         break;
 312                         }
 313
 314                         if ( $pageOK ) {
 315                                 $this->resolvablePages++;
 316                         } else {
 317                                 $ok = false;
 318                         }
 319                 }
 320
 321                 return $ok;
 322         }
 323
 324         /**
 325          * Check and repair the destination fields in a link table
 326          * @param string $table The link table name
 327          * @param string $fieldPrefix The field prefix in the link table
 328          * @param int $ns Destination namespace id
 329          * @param string $name
 330          * @param array $options Associative array of validated command-line options
 331          * @param array $extraConds Extra conditions for the SQL query
 332          */
 333         private function checkLinkTable( $table, $fieldPrefix, $ns, $name, $options,
 334                 $extraConds = []
 335         ) {
 336                 $batchConds = [];
 337                 $fromField = "{$fieldPrefix}_from";
 338                 $namespaceField = "{$fieldPrefix}_namespace";
 339                 $titleField = "{$fieldPrefix}_title";
 340                 $batchSize = 500;
 341                 while ( true ) {
 342                         $res = $this->db->select(
 343                                 $table,
 344                                 [ $fromField, $namespaceField, $titleField ],
 345                                 array_merge( $batchConds, $extraConds, [
 346                                         $namespaceField => 0,
 347                                         $titleField . $this->db->buildLike( "$name:", $this->db->anyString() )
 348                                 ] ),
 349                                 __METHOD__,
 350                                 [
 351                                         'ORDER BY' => [ $titleField, $fromField ],
 352                                         'LIMIT' => $batchSize
 353                                 ]
 354                         );
 355
 356                         if ( $res->numRows() == 0 ) {
 357                                 break;
 358                         }
 359                         foreach ( $res as $row ) {
 360                                 $logTitle = "from={$row->$fromField} ns={$row->$namespaceField} " .
 361                                         "dbk={$row->$titleField}";
 362                                 $destTitle = $this->getDestinationTitle( $ns, $name,
 363                                         $row->$namespaceField, $row->$titleField, $options );
 364                                 $this->totalLinks++;
 365                                 if ( !$destTitle ) {
 366                                         $this->output( "$table $logTitle *** INVALID\n" );
 367                                         continue;
 368                                 }
 369                                 $this->resolvableLinks++;
 370                                 if ( !$options['fix'] ) {
 371                                         $this->output( "$table $logTitle -> " .
 372                                                 $destTitle->getPrefixedDBkey() . " DRY RUN\n" );
 373                                         continue;
 374                                 }
 375
 376                                 $this->db->update( $table,
 377                                         // SET
 378                                         [
 379                                                 $namespaceField => $destTitle->getNamespace(),
 380                                                 $titleField => $destTitle->getDBkey()
 381                                         ],
 382                                         // WHERE
 383                                         [
 384                                                 $namespaceField => 0,
 385                                                 $titleField => $row->$titleField,
 386                                                 $fromField => $row->$fromField
 387                                         ],
 388                                         __METHOD__,
 389                                         [ 'IGNORE' ]
 390                                 );
 391                                 $this->output( "$table $logTitle -> " .
 392                                         $destTitle->getPrefixedDBkey() . "\n" );
 393                         }
 394                         $encLastTitle = $this->db->addQuotes( $row->$titleField );
 395                         $encLastFrom = $this->db->addQuotes( $row->$fromField );
 396
 397                         $batchConds = [
 398                                 "$titleField > $encLastTitle " .
 399                                 "OR ($titleField = $encLastTitle AND $fromField > $encLastFrom)" ];
 400
 401                         wfWaitForSlaves();
 402                 }
 403         }
 404
 405         /**
 406          * Move the given pseudo-namespace, either replacing the colon with a hyphen
 407          * (useful for pseudo-namespaces that conflict with interwiki links) or move
 408          * them to another namespace if specified.
 409          * @param array $options Associative array of validated command-line options
 410          * @return bool
 411          */
 412         private function checkPrefix( $options ) {
 413                 $prefix = $options['source-pseudo-namespace'];
 414                 $ns = $options['dest-namespace'];
 415                 $this->output( "Checking prefix \"$prefix\" vs namespace $ns\n" );
 416
 417                 return $this->checkNamespace( $ns, $prefix, $options );
 418         }
 419
 420         /**
 421          * Find pages in main and talk namespaces that have a prefix of the new
 422          * namespace so we know titles that will need migrating
 423          *
 424          * @param int $ns Destination namespace id
 425          * @param string $name Prefix that is being made a namespace
 426          * @param array $options Associative array of validated command-line options
 427          *
 428          * @return ResultWrapper
 429          */
 430         private function getTargetList( $ns, $name, $options ) {
 431                 if ( $options['move-talk'] && MWNamespace::isSubject( $ns ) ) {
 432                         $checkNamespaces = [ NS_MAIN, NS_TALK ];
 433                 } else {
 434                         $checkNamespaces = NS_MAIN;
 435                 }
 436
 437                 return $this->db->select( 'page',
 438                         [
 439                                 'page_id',
 440                                 'page_title',
 441                                 'page_namespace',
 442                         ],
 443                         [
 444                                 'page_namespace' => $checkNamespaces,
 445                                 'page_title' . $this->db->buildLike( "$name:", $this->db->anyString() ),
 446                         ],
 447                         __METHOD__
 448                 );
 449         }
 450
 451         /**
 452          * Get the preferred destination title for a given target page.
 453          * @param int $ns The destination namespace ID
 454          * @param string $name The conflicting prefix
 455          * @param int $sourceNs The source namespace
 456          * @param int $sourceDbk The source DB key (i.e. page_title)
 457          * @param array $options Associative array of validated command-line options
 458          * @return Title|false
 459          */
 460         private function getDestinationTitle( $ns, $name, $sourceNs, $sourceDbk, $options ) {
 461                 $dbk = substr( $sourceDbk, strlen( "$name:" ) );
 462                 if ( $ns == 0 ) {
 463                         // An interwiki; try an alternate encoding with '-' for ':'
 464                         $dbk = "$name-" . $dbk;
 465                 }
 466                 $destNS = $ns;
 467                 if ( $sourceNs == NS_TALK && MWNamespace::isSubject( $ns ) ) {
 468                         // This is an associated talk page moved with the --move-talk feature.
 469                         $destNS = MWNamespace::getTalk( $destNS );
 470                 }
 471                 $newTitle = Title::makeTitleSafe( $destNS, $dbk );
 472                 if ( !$newTitle || !$newTitle->canExist() ) {
 473                         return false;
 474                 }
 475                 return $newTitle;
 476         }
 477
 478         /**
 479          * Get an alternative title to move a page to. This is used if the
 480          * preferred destination title already exists.
 481          *
 482          * @param LinkTarget $linkTarget
 483          * @param array $options Associative array of validated command-line options
 484          * @return Title|bool
 485          */
 486         private function getAlternateTitle( LinkTarget $linkTarget, $options ) {
 487                 $prefix = $options['add-prefix'];
 488                 $suffix = $options['add-suffix'];
 489                 if ( $prefix == '' && $suffix == '' ) {
 490                         return false;
 491                 }
 492                 while ( true ) {
 493                         $dbk = $prefix . $linkTarget->getDBkey() . $suffix;
 494                         $title = Title::makeTitleSafe( $linkTarget->getNamespace(), $dbk );
 495                         if ( !$title ) {
 496                                 return false;
 497                         }
 498                         if ( !$title->exists() ) {
 499                                 return $title;
 500                         }
 501                 }
 502         }
 503
 504         /**
 505          * Move a page
 506          *
 507          * @param integer $id The page_id
 508          * @param LinkTarget $newLinkTarget The new title link target
 509          * @return bool
 510          */
 511         private function movePage( $id, LinkTarget $newLinkTarget ) {
 512                 $this->db->update( 'page',
 513                         [
 514                                 "page_namespace" => $newLinkTarget->getNamespace(),
 515                                 "page_title" => $newLinkTarget->getDBkey(),
 516                         ],
 517                         [
 518                                 "page_id" => $id,
 519                         ],
 520                         __METHOD__ );
 521
 522                 // Update *_from_namespace in links tables
 523                 $fromNamespaceTables = [
 524                         [ 'pagelinks', 'pl' ],
 525                         [ 'templatelinks', 'tl' ],
 526                         [ 'imagelinks', 'il' ] ];
 527                 foreach ( $fromNamespaceTables as $tableInfo ) {
 528                         list( $table, $fieldPrefix ) = $tableInfo;
 529                         $this->db->update( $table,
 530                                 // SET
 531                                 [ "{$fieldPrefix}_from_namespace" => $newLinkTarget->getNamespace() ],
 532                                 // WHERE
 533                                 [ "{$fieldPrefix}_from" => $id ],
 534                                 __METHOD__ );
 535                 }
 536
 537                 return true;
 538         }
 539
 540         /**
 541          * Determine if we can merge a page.
 542          * We check if an inaccessible revision would become the latest and
 543          * deny the merge if so -- it's theoretically possible to update the
 544          * latest revision, but opens a can of worms -- search engine updates,
 545          * recentchanges review, etc.
 546          *
 547          * @param integer $id The page_id
 548          * @param LinkTarget $linkTarget The new link target
 549          * @param string $logStatus This is set to the log status message on failure
 550          * @return bool
 551          */
 552         private function canMerge( $id, LinkTarget $linkTarget, &$logStatus ) {
 553                 $latestDest = Revision::newFromTitle( $linkTarget, 0, Revision::READ_LATEST );
 554                 $latestSource = Revision::newFromPageId( $id, 0, Revision::READ_LATEST );
 555                 if ( $latestSource->getTimestamp() > $latestDest->getTimestamp() ) {
 556                         $logStatus = 'cannot merge since source is later';
 557                         return false;
 558                 } else {
 559                         return true;
 560                 }
 561         }
 562
 563         /**
 564          * Merge page histories
 565          *
 566          * @param stdClass $row Page row
 567          * @param Title $newTitle The new title
 568          * @return bool
 569          */
 570         private function mergePage( $row, Title $newTitle ) {
 571                 $id = $row->page_id;
 572
 573                 // Construct the WikiPage object we will need later, while the
 574                 // page_id still exists. Note that this cannot use makeTitleSafe(),
 575                 // we are deliberately constructing an invalid title.
 576                 $sourceTitle = Title::makeTitle( $row->page_namespace, $row->page_title );
 577                 $sourceTitle->resetArticleID( $id );
 578                 $wikiPage = new WikiPage( $sourceTitle );
 579                 $wikiPage->loadPageData( 'fromdbmaster' );
 580
 581                 $destId = $newTitle->getArticleID();
 582                 $this->beginTransaction( $this->db, __METHOD__ );
 583                 $this->db->update( 'revision',
 584                         // SET
 585                         [ 'rev_page' => $destId ],
 586                         // WHERE
 587                         [ 'rev_page' => $id ],
 588                         __METHOD__ );
 589
 590                 $this->db->delete( 'page', [ 'page_id' => $id ], __METHOD__ );
 591
 592                 $this->commitTransaction( $this->db, __METHOD__ );
 593
 594                 /* Call LinksDeletionUpdate to delete outgoing links from the old title,
 595                  * and update category counts.
 596                  *
 597                  * Calling external code with a fake broken Title is a fairly dubious
 598                  * idea. It's necessary because it's quite a lot of code to duplicate,
 599                  * but that also makes it fragile since it would be easy for someone to
 600                  * accidentally introduce an assumption of title validity to the code we
 601                  * are calling.
 602                  */
 603                 DeferredUpdates::addUpdate( new LinksDeletionUpdate( $wikiPage ) );
 604                 DeferredUpdates::doUpdates();
 605
 606                 return true;
 607         }
 608 }
 609
 610 $maintClass = NamespaceDupes::class;
 611 require_once RUN_MAINTENANCE_IF_MAIN;